I have an old house (1900) with a 3/4 fir subfloor that I'm planning to have new 3/4 hardwood installed over. There are two rooms, a dining room and a living room. The dining room is looking pretty good, but the living room has some issues.

From one side of the room to the other (about 10ft wide) the floor has a gradual slope, probably 1 to 1-1/2 inch drop from one side to the other. What is the least painful approach for this situation?

For reference, the new floor would be layed perpendicular to this slope direction.

Any ideas would be great, thanks.

Rip cut some sleepers and place them less then a foot apart.

OK, so I know what rip cutting is, but what the hell are sleepers? You've stumped me!

Thanks!

2x4 or 2x6's layed on their sides, so your nailing into the wide part of the boards.

You just have to rip cut them to get you slope handled. Meaning they won't all be the same thickness.

I guess you could do the same with plywood, as your thickness needs to be thinner.